Drilling machine



March 9 1926. 1,576,110

R. M. GALLOWAY ET AL DRILLING MACHINE Filed Sept. 7, 1923 5 Sheets-Sheet l 7 Bil/671M719:

Wobaniflf. Galow 89 PM C Eur/i077 yqzzw m March 9 ,1926.

I R. M. GALLOWAY ET AL DRILLING MACHINE Filed Sept. 7, 1923 5 Sheets-Sheet 2 [ward/@715: J'Poba 776 7/1, Galfc' u March 9 1926.

R. M. GALLOWAY ET AL DRILLING MACHI NE 5 Sheets-Shet 5 Filed Sept. '7, 1923 ZZUJEU'ZZQJT'S jfobmat M. Galawgy M GEM/i071 Jan/1,4]

March 9 1926. 1,576,110

R. M. GALLOWAY ET AL DRILLING MACHINE Filed Sept. '7 1925 5 Sheets-Sheet '4 jwzzrdo n5 F019 @7261. Galklawg PM a, 13mm @WW M%%% March 9 1926. 1,576,110

R. M. GALLOWAY ET AL DRILLING MACHINE Fil ed Sept. 7, 1925 5 Sheets-Sheet 5 Patented Mar. 9-, 19260 UNITED STATES 1,576,110 PATENT OFFICE.

ROBERT M. GALLOWAY AND PAUL C. BURTON, OF RICHMOND, INDIANA, ASSIGNORS TO THE NATIONAL AUTOMATIC TOOL COMPANY,

POBATION OF INDIANA 0F RICHMOND, INDIANA, 'A COB- DRILLING macnmn.

Application filed September 7,1923. Serial No. 661,448.

ToaZZ whom it mag, concern Be it known that we, ROBERT M. GALLO- WAY and PAUL C. BURTON, citizens of the United States, residing at Richmond, in the county of lVayne and State of. Indiana, have invented certain new and useful Improvements in Drilling Machines, of which the following is a, specification.

This invention relates to improvements in drilling machines and its purpose is to provide improved means for'moving the drill head on its support. The principal object of the invention is to provide means for effecting a rapid movement of the drill head during its non-working'stroke and for automatically throwing into operation the power feed mechanism which advances the drill head after the cutting tools have been brought into proximity with the surface of the work. An improved feature of the invention is the provision of means for effecting the rapid traverse of the drill mechanism without the necessity of disconnecting the power feed mechanism which advances the drill head during the working stroke.

A further object is to provide a. motor operated rapid traverse mechanism comprising means -for arresting the operation of the motor at predetermined intervals in the operation of the machine, the order of oper tions of the 'feed mechanism and the rapid traverse mechanism being regulated entire- 1y bythe motor control. Other objects rclate to various features of construction and arrangementwhicli will appear more fully 1 hereinafter. a

The nature of the invention will be understood from the following specificationta-kenwith the accompanying drawings in which one embodiment is illustrated. In the drawings, Fig. 1 shows a side elevation of a drilling machine embodying the pres ent invention; Fig. 2 shows an enlarged side elevation of the drill head with adjacent parts of the operating mechanism; Fig. 3 shows a horizontal section taken on the line 3-3 of Fig. 2, illustrating a top plan view of the drill head and associated parts of the machine; Fig. 4 shows a detailed sec-- tional View on the line i -4 of Fig. 3; Fig. 5 shows-a detailed section on the line 55 of Fig. 3: Fig. 6 shows a detailed vertical section taken on the line 66 of Fig. 5; Fig. 7 shows a longitudinal section taken on the line 7-7 of. Fig. 6; Fig. 8 shows a side elevation of the, switch by which the operation-of the rapid traverse motor is con trolled; Fig. 9 shows an end elevation of the switch, looking toward the right as viewed in Fig. 8; Fi 10 shows a sectional View taken on the line 10-10 of Fig. 8; Fig. 11 shows a sectional view taken on the line 11'11 of Fig. *8; and Fig. 12 shows a top plan view of the left end of the switch, as viewed in Fig. 8.

As illustrated in the drawings, the improved drilling machine comprises a supporting base 20, having mounted thereon a hollow vertical standard 21 ada ted to carry the principal parts of the dril mechanism. This standard is provided on one side with vertical guide flanges 22 which are adapted to engage the vertical guideways 23 formed on the lateral exten sion 24 of the drill head 25. The part 24 of the drill head has plates 26 secured thereto by-bolts 27 to overla. the guide flanges 22, thus locating the d ill head securely on the supporting standard and permitting the vertical movement thereof. The drill head is connected to a cable 28 which extends over a pulley 29 mounted in a slot in the upper part of the standard on a shaft 30, and a suitable counterweight 31 is connected to the other end of the cable within the hollow standard 21, thus minimizing the work which must be done to move the drill head along its vertical guide- The drill head 25 is provided with a plurality of drill spindles 33, only two of which are illustrated, and these drill spindles are actuated by suitable gears and pinions located within the drill head and driven from above through a vertical drive shaft 34. This shaft is driven by bevel gears located in the gear casing 35 which is mounted on bearings carried by the standard 21 and the bracket 43 mounted on the base 20. Another pulley 44 is fixed on the shaft 42 adjacent to the pulley 41 and an idler pulley 45 is rotatabiy mounted on the shaft adjacent the pulley 44. A driving belt actuated by a motor or line shaft is adaptedto engage the pulleys 44 and 45 and to be passed from one to the other by means of the shifting fork 46 which is slidably mounted on the rod 47 extending between the bracket 43 and the standard 41. The fork 46 carries arms 48 adapted to extend on opposite sides of the drive belt and the fork is shifted on the rod 47 by means of a crank 49 which actuates a lever 50 connected by a link 51 to the fork. The forego ing features of construction are common in drilling machines and do not in themselves constitute a part of the present invention.

The drill head 25 is moved vertically on the standard 21 by means of a rack bar 54 mounted on the side of the standard. between the guide flanges 22 and adapted. to be engaged by a pinion 55 mounted on the horizontal shaft 56 which is journaled in bearings carried by the lateral extension 24 of the. drill head. The shaft 56 extends through the wall of the part 24 of the head and is journaled in the end wall 57 of a casing 57 which is secured to the side of the head. The end of the shaft 56 has a gear 58 keyed thereon within the casing 57 and this gear is driven by a pinion 59 -formed integrally with the shaft 60 which is journaled in'bearings 61 and 62 carried by the end walls of the casing, as shown particularly in Fig. 7. The longitudinal movement of the shaft 60 away from the bearing 61 is prevented by a collar 63 which is pinned to the shaft adiacent to the bearing 62, A circular plate 64 is mounted on the shaft 60 adjacent to the pinion 59, this plate serving as aspacer between the pinion and the worm wheel 65 which is rotatably mounted on the shaft and adapted to be driven by a worm 66 which is keyed on the vertical power driven shaft 67. This shaftextends upwardly at the side of the column or standard 21 and is connected at its lower end through a universal joint 68 wit-h the shaft' 69. This shaft is driven by suitable gearing mechanism located in the casing 70 and connected to the shaft 42 which is driven by the belt from a line shaft or a motor. Suitable change speed mechanism is located in the casings 71 and 72, this mechanism being operated by the levers 73 and 74 to secure the desired speed of rotation of the shaft 67. The worm wheel 65, which is driven constantly byith worm 66 on the shaft 67, has a clutch'member 75 rotatably mounted on the enlarged portion 05 of the hub of the worm wheel. A circular plate 76 is secured to the side of the clutch member 75 to space it from the worm wheel 65 and the side face of the clutch member is provided, within the bore of the plate 70 and outwardly of the hub of the worm wheel, with a series of ratchet teeth 77 adapted to be engaged normally by the clutch pins 78 which are slidably mounted in apertures 79 extending through the worm wheel 65. These clutch pins are provided with sockets which have mounted therein the coil springs 80, the opposite ends of the springs bearing against the plate 04 so that the pins are forced into engagement with the ratchet teeth 77. The clutch member 75 is normally rotated by the worm wheel 65 due to the engagement of the clutch pins with the ratchet teeth 77 but the clutch member 75 may be rotated at a higher speed than and in the same direction as the worm wheel, whereupon the clutch teeth will slide over the inclined end faces of the clutch pins 78 and these pins will merely reciprocate in the holes 79 in the .worm wheel. tained on the enlarged hub of the .worm wheel by means of a collar 81 which is secured thereto by the cap screws 82, the collar being mounted on the reduced portion 65 of the hub.

The clutch member 75 is provided on the side thereof opposite the ratchet teeth 77 with clutch teeth 85 adapted to be engaged by other clutch teeth 86 formed on the clutch member 87. The member 87 is splined on a sleeve 88 by means of a key 89 and the sleeve is in turn secured tothe shaft 60 by means of a key 90. The clutch member 87 is recessed inwardly from the clutch 'teeth 86 to receive a washer 92 which is mounted on the reduced hub 65 of the worm wheel and this washer is engaged by plungers 93 mounted in holes 94 which are formed in the hub of the worm wheel so that the coil springs 95 mounted between the lungers and the plate .64 serve normally to orce the clutch member -87 away from the clutch member7 5 with the resulting disengagement of the clutch teeth 85 and 86. The movement of the clutch member 87 away from the clutch member 85 is limited by the cam carrier which is mounted on the reduced portion 60 of the shaft 60. This cam carrier is provided with a plurality of notches 101 having located therein the cams 102 -which are pivoted on transverse pins'103.'

moved longitudinally toward the cam car-- rier the conical surface 107 engages the pro- The clutch member 75 is rejeetions 105 of the cams and forces them outwardly with the result that the opposite projections 104 move the clutch member 87 into engagement with the clutch member 7 5; The clutch spool 108 is moved longitudinally by means of pins 110 and lll engaging the annular groove 112, the pins beingcarried by the arms of a yoke 113 which is pivotally mounted on a bolt 114 extending through and secured in the upper and lower walls of the casing 57. The upper pin 111 extends above the boss at the end of the yoke and is shouldered and threaded at its upper end. to be engaged by a nut 115 and a washer 116. The pins 110; and 111 are pressed into the holes in the arms on the yoke and the projecting portion of the pin 111 serves as the operating member for moving the yoke 113 on its pivot and thereby reciprocating the clutch spool 108.

The clutch yoke 113 is operated by means of aworm carrier 120 which is rotatably engaged and supported by a shaft 121 jour naled in bearings 122 and 122* carried by the walls of thecasing 57. The worm carrier has an arm 120 adapted to extend between the washer 116 and the adjacent arm of the yoke 113, the part- 120 having a notch 123 which engages the pin 111, the notch being elongated so that some movement of the causing a movement of the yoke 113, while the washer and yoke prevent the worm carrier from turning on the shaft 121. The

worm carrier 120 is in the form of a yoke and a worm 125 is splined on the shaft 121 between the end bearings of the worm car rier, the end thrust of the worm being received by ball thrust bearings 126 which are mounted on the shaft at the ends of the worm. The projecting end of the shaft 121 has a gear Wheel 127 fixed thereon and arranged to mesh with an intermediate gear 128 which in turn is 'driven by a gear 129 secured on the shaft of an electric motor 130. The motor is mounted on the casing 57 and the intermediate gear 128 ismounton a stub shaft 131 projectingfrom the end casing of the motor. as shown in Fig. 5. This motor is controlled by the switch mechanism hereinafter described.

The main shaft is driven from the worm 125 through intermediate connections having engagement with the bevel gear 135 which is rotatably mounted on the shaft 60 at the end of the sleeve 109. The hub 136 of the gear has clutch teeth 137 formed thereon to mesh with the clutch teeth 138 formed on the sliding clutch member 139.

which is mounted between the clutch members on the shaft 60, the clutch members being recessed to receive the spring. The movable clutch member 139 is actuated to engage the clutch member 136 by means of the rocker 144 which engages the cross bar 145 on the yoke 1.42, the yoke being pivoted on a bolt 146 which extends through and between the side walls of the casing. The rocker 144 is pivoted on a pin 147 which is secured in the hub 148 carried by the casing 57 and is prevented from dropping of]? the pin by the small cotter pin 149. The rocker 144 has a flat face 150 extending between the cornersv or projections 151 and when the rocker is in its normal position, the face 150 is adapted to extend transversely to the center line of the shaft 60 in fullcontact with the cross bar 145 of the clutch yoke. The rocker 144 is further provided with an operating arm 152 which normally extends in a direction transverse to the axis of the shaft 60 and it is provided at its end with a notch 154 adapted to be engaged by the pin 155 which projects downwardly from the worm carrier 120. When the worm carrier moves either to the right or the left, as viewed in Fig. 6, from its normal position, the rocker 144 is tilted sothat one or the other of the projections 151 operates to move the cross bar 145 to-' cam carrier 120 may take place without' ward the left as viewed in Figs. 6 and 7, thereby bringing the clutch member 139 into engagement with the clutch member 136 and causing the shaft 60 to be driven by the bevel gear 135.

The bevel gear 135 is in turn actuated by a against one end of the hub 168 and the other end of the hub is engaged by a collar 169 which has set screws 170 passing therethrough and entering 'thetapered recesses 170 which are formed in the sleeve 165.,- These set screws may be adjusted in the recesses 170 to vary the frictional engagement of the collar 169 and the worm wheel 166 upon the ends of the hub 168, thus regulating the resistance which must b overcome to turn the worm wheel 166, as hereinafter more fully explained. A fixed clutch member 175 is pinned on the pilot shaft 164 with the teeth thereof opposing the teeth of the clutch member 165 and between these two clutch members there is located a sliding clutch member 176 which is splined on the members 136 and 139 are simultaneously enelongated hub 161 of the bevel pinion 160. The sliding clutch member 176 has clutch teeth on its opposite end faces toengage the teeth of the clutch members 165 and17 5 and arstud 177 projects downwardly from the s iding clutch 176 to permit the manual operation thereof. When the cutch member 176 is moved into enga ement with they clutch member 175 a driving connection is formed between the shaft 164 and-the hub 16.1 of the pinion 160 so that, if the clutches 136 and 139 are simultaneously engaged, the

shaft 60 may be operated by the manual rotation of the hand wheel 181 secured on the end of the shaft 164 beyond the bearing 182 in which the end of the pilot shaft is journaled. The bearing 182 is formed on a bracket 180 and a collar 183 is pinned on the shaft 164 at the end of the bearing opposite the hand wheel to prevent thelongitudinal movement of the pilot shaft. When the clutch member 176 is moved into engagement with the clutch sleeve 165, a driving connection is formed between'the worm wheel 166 and the bevel pinion 160, so that if the clutch gaged, the shaft 60 may be driven by the electric motor 130 through the worm 125 and the worm wheel 166. The sliding clutch member 176 thus permits either a manual or a motor driven operation of the main shaft 60. through which the head 25 is raised and .lowered on the column or standard 21 and the arrangement is such that only one method of operation is capable of being employed at one time. v

The electric motor 130 which is employed for effecting the rapid movement of the drill head 25 is operated by an electric circuit comprising electric conductors leading thereto through the conduit 185. This conduit leadsfrom a junction-box 186 into which the feed wires are conveyed to the vertical conduit 187. The circuit thus established to the motor is controlled by a switch 188, the connections to which-are made from the junction-box 186 through the conduit 180.

The switch 188 comprises a casing 190 lined with suitable insulating material 191 and cloed by a detachable cover 192. A shaft 195 is journaled in bearings 196 carried by the end walls of the casing and this shaft has fixed thereon a drum 197 of insulating ma- M also project on opposite sides of another lug 205' which is formedon the upper end of a lever 205 by which the switch is operated. This lever is fixed on a shaft 206 which extends through the lower part of the casing 190, being 'ournaled in bearings 207 carried by the en vwalls'of the casing. The shaft 206 is ope-rated by a crank arm 208 which is secured thereto at the end of the switch casing op osite the lever 205 and this crank arm isplvotally. connected with a switch link 210 which'extends along the side of the drill head 25 as illustrated in Fig. 1. The other end of this switch link is pivotally connected to a bell crank lever 211 which is pivoted on the bracket 180. The lever 211 has a projecting handle 212 which may be fengage by the operator to effect the manual operation of the switch mechanism but the switch is adapted to be operated, duringv the automatic 0 eration of the machine, y means of trip ogs' adapted to be engaged by a roller 215 which is rotatably mounted on the lever 205 as shown in Fig. 8. WVhen the lever 205 is moved toward the right as Viewed in Fig. 9, either by the engagement of a dog with the roller .215 or by the manual operationaof the switch ink 210, the lug 205 engages the end 204 of the spring 202 and thereby carries with it the rocker 201 until the lug 217 on the rocker is engaged by the lug 216 on the lever. A further motion of the level- 205 in the same direction continues to carry theend 204 of the spring with it, while the ln 216 slides under the. lug 217, thereby win in s ring, due to the fact that the on 203 of t e spring is held by the lug 201 of the rocker. When thelug 216 is moved through the required distance, the lug 217 passes between the lugs 216 and 216 and the spring 202 then turns the rocker and the shaft 195 with the result that the, contact rings 108 are brought into contact with the contact fingers 199. When this is accomplished the energy of the spring is exhausted and the contact rings remain in engagement with the fingers until the lever 205 is moved the required distance in the reverse direction. A further motion of the lever 205 in the same direction, after the circuit has been closed, is prevented by the engagement of the lug 205 with a stationary lug 218 formed on the end wall of the casing. A similar lug 219 limits the movement of the lever 205 in the reverse direction. To bring the contact rings 198 out of engagement with the fingers 199, the lever 205 is moved in the opposite direction, whereupon the .lug 205 engages the end 203 of the spring and carries the rocker with it until the end of the lug 217 strikes on the under face of the lug 216 and stops the motion of the rocker while the lug 216 slides over the lug 217 until a point is reached where the rocker is free to return to its. original position under the influence up the 4 the drill continues until the drills or other;

of the spring which is partially'wound up while the lugs 216 and 217 are in sliding contact with each other. lVhen the lever 205 is moved in the reverse direction, that isi," toward the left from the neutral position i1- lustrated in-Fig; 9, the operation is reversed and the lugs 216 and 217 control the action of the spring in permitting a quick release of the rocker to move the contact rin 5 into engagement with the fingers, there y establishing a circuit through the motor in the reverse direction. By means of this construction the circuit of the motor is broken or closed almost instantaneously regardless of the angular velocity of the operating lever 205 which may be moved very slowly in some instances. I Y I The switch 188 is actuated automatically to control the operation ofthe. motor 130 by means of a plurality of trip dogs which are adj-ustably mounted on the vertical trip rod 225 mounted in brackets 226 secured to the side of the standard 21. When the head is being moved downwardly by the rapid traverse mechanism, the rap1d movement of cutting tools are brought into proximity of the work, whereupon the roller 215 carried by the operating arm 2050f the switch engages the trip dog 228which is carried by a block 229 adjustably secured to the trip rod 225 by means of a set screw 230. This trip dog'throw's the switch into neutral position and arrests the operation of the motor 130 after which the head continues to move downwardly at a slow rate of speed under the action of the power feed mechanism. When the drills or other cutting tools have passed through the work, the roller 215 on the switch arm 205 engages another dog 231 carried by the block 232 which is adjustably mounted on the trip rod 225 by means of a set screw233. This results in the reversal of the motor 130 which then moves the head upwardly at .a rapid rate until the roller'215 of the switch arm 205 engages another trip dog 234 carried by the block 235 which is adj ustably mounted on the trip rod by means of a set screw 236. The dog 234 throws the switch into neutral position and stops the motor after which a limited continued movement of the head, due to its momentum, causes the roller 215 to engage another trip dog 237 which is carried by the block 238 adjustably mounted on the trip rod 225 by means of the set screw 239. The dog 237 again reverses the circuit of the motor 130 so that the head is again moved downwardly at a rapid rate.

Although the motor 130 may be started or stopped at any time by actuating the switch 188 through the switch rod 210 and the bandle 212, and although the rapid traverse mechanism may be arrested at any time by shifting the clutch 176, the reversal of the circuit of the motor 130 and the succession of upward and downward movement of the drill head 25 takes place automatically during the ordinary operation of the machine. Assuming that the drill head is at the top of the stroke, the operator starts the machine by shifting the clutch 17 6 toward the left, as

viewed in Figs. 1 and 5, to forma drivin connection between the worm wheel 166 an the hub 161 of the bevel pinion 160 and the circuitof the motor 130 is then closed by operating the switch 188 through theproper movement of the handle 212. At this stage of the operation of the machine, the clutch members 136 and 139 are engaged ashereinafter more fully explained, and when the circuit of the motor '130 is closed, the first effect is to :produce an end thrust in the worm 125 toward the left as viewed in Figs. 6 and 7, this end thrust being produced by reason of the angle of the worm threads engaging the spaces betweenthe teeth of the worm wheel 166. As previously pointed out, the collar 169 mounted on the clutch 165 can be adjusted by means of the screws 170 to vary the frictional engagement of, the

collar and the worm wheel upon the hub 168. and this frictional resistance is adjusted so that more linear force is required on the pitch line of the worm wheel to turn it against this frictional resistance than is required to move the worm 125 together with nism for effecting the rapid downward movement of the drill head 25. The movement of the worm 125 and the worm carrier 120 toward the left, as viewed inFigs. 6 and 7, tilts the rocker 144 so that when the carrier is in its extreme leftposition, the clutch members 136 and 139 are maintained in engagement by the pressure of the rbcker 144 on the cross bar 145 of the clutch yoke 140. The movement of the worm carrier 120 toward the left, as viewed in Figs. 6 and 7, also tilts the clutch yoke 113 due to the engagement of the arm 120 of the carrier with the pin 111. This causes the clutch spool 108 to move the cams 102 outwardly, thereby causing the clutch member 87 to engage the clutch member 7 5." The clutch member then rotates rapidly, at a greater speed than the' worm wheel 65, while the ratchet teeth click over the ends of the clutch pins 78. When the ends of the drills have been brought into proximity with the surface of the work, the motorf130 is stopped by the .action of the tri dog 228 engaging the roller on the switc 1 arm 205 and the continuously rotating worm wheel then picks up the clutch member and rotates it at a relatively slowspeed adapted to effect the desired slow movement of the drill head 25 during the operation of drilling. The clutch members 75 and 87 being still engaged, the motion of the clutch member 75 is transmitted to the shaft 60 to effect this desired slow movement. The clutch members 136 and 139 being also still engaged, the shaft 60 drives the bevel pinion 160 at a slow speed in the same direction 'that'it was rotating duringthe rapidmotion of the .drill head. Since the worm wheel 166 is unable to drive the worm 125 and the motor 130, the slow rotation. of the bevel pinion 160 merely produces an end thrust on the worm 125, toward the rig-ht as viewed in Figs. 6 and 7, which results in a shifting of the cam carrier 120 toward the right until the flat face 150 of the rocker 144 reaches a position transverse to the axis of the shaft 60, in contact with the cross bar 145 of the yoke 142, in which position of the rocker, the clutch members 136.and 139 are fully disengaged by the action of the coil spring 143. The rotation of the bevel pinion 160 and the worm wheel 166 is then arrested. The motion of 'the cam carrier120 toward the right, suflicient to effeet the disengagement of the clutch members 136 and 139, does not aifect the yoke 113 and the clutch spool 108 because the elongated slot 123 in the arm 120 permits the necessary movement of the worm carrier without causing any movement of the pin 111. The clutch members 87 and 75 therefore remain in engagement while the drill head continues its slow downward movement. When the drills have passed throiwh the work,'the motor 130 is reversed by tie dog 231 and the initial reverse operation of the motor sets up an end thrust in the worm 125'toward the right, as viewed in Figs. 6 and 7 thus causing a further movement of the worm carrier toward the right until it engages the end of the boss which carries the bearing 122', whereupon the motion of the worm carrier is arrested and the torque of the motor transmitted to the worm 125 is then applied in overcoming the frictional resistance of the collar 169 and the, worm wheel 166 upon the hub 168, with the result that the worm wheel 166 is driven in a direction adapted to effect an upward movement of the drill head. This upward movement begins as soon as the worm carrier 120 reaches its extreme right-hand position because the movement of the worm carrier tilts the rocker 144 until the lower point. 151 of the rocker moves the clutch members 136 and 139 into engagement with each other, as shown in Fig. 6, thereby establishing a drivmg connection between the bevel gear 135 and the shaft 60. At the same time that the clutch members 136 and 139 are engaged by the movement of the worm carrier 120 toward the right, the arm 120' of the worm carrier tilts the yoke 113 and shifts the clutch spool 108 so that the clutch members '75 and 87 are permitted to disengage under the influence of the plungers 93 and springs 95. The drill head then continues its upward movement until the motor 130 is stopped and reversed by the action of the trip dogs 234 and 237. \Vhen this reversal takes place, with the drill head 25 in the desired upper position, the worm carrier 120 is in its extreme right-hand position, as shown in Fig. 6, and the clutch members 136 and 139 are still engaged, so that the drill head immediately begins to move rapidly downward again, setting up an end thrust in the worm 125 toward the left and causing the whole cycle of operations to be repeated as before. The succession of operations of the rapid traverse mechanism and the power feed mechanisms are thus brought about automatically and the reversals in the direction of movement of the drill head may be caused to occur at any desired points in its travel through the adjustment on the trip rod 225 of the trip dogs by which the circuit of the motor 130 is controlled. Animportant advantage of the invention is that the succession of operations of the power feed mechanism and the rapid traverse mechanism is controlled entirely by the regulation of the circuit of the electric motor, the engagement of the clutches being brought about automatically in response to the changes in the circuit condition of the motor. The mechanism is therefore capable of very fine adjustment and operates to effect a great saving of time in the operation of drilling machines or other machines to which the invention may be applied. 1

Although a single formof machine has been shown and described for purposes of illustration, it will be understood that the invention may be constructed in various other embodiments without departing from the scope of the appended claims.

\Ve claim:

1. In a machine of the class described, a movable head, slow power feed mechanism for moving said head. rapid traversemechanism for moving said head, means for coutrolling said rapid traverse mechanism and means actuated upon starting the traverse mechanism in one direction for operatively connecting the slow feeding mechanismto the head and upon starting the traverse mechanism in a reverse direction for disconnecting the slow power feed mechanisu'i from thehead.

2. In a machine of the class described, a

movable head slow power feed mechanism for moving sald head, rapid traverse mechanism for moving said head, electrically actuated. means for controlling said rapid traverse mechanism, and means controlled by the starting of said rapid traverse mechanisnr for controlling the operation of said slow power feed mechanism. a

3. In a machine of the class described, amovable head, slow power feed mechanism for moving said head, rapid traverse mechanism for moving said head, means for connecting said rapid traverse mechanism to move said head, means for arresting the operation of said rapid traverse mechanism, and means actuated by the operation of said slow power feed mechanism for disconnecting said rapid traverse mechanism.

4. In a machine of the class described, a movable head, slow power feed mechanism for moving said head, rapid traverse mechanism for moving said head jd'means actuated by said rapid traverse' inechanism for establishing an operative connection of said feed mechanism with said head, said connection being adapted to permit simultaneous operation of said rapid traverse mechanism.

5. In a machine of the class described, a movable head. slow power feed mechanism for moving said head, rapid traverse mechanism for moving said head, means actuated by said rapid traverse mechanism for establishing an operative connection of said slow feed mechanism with said-head, said connection being adapted to permit simultaneous operation of said rapid traverse mechanism, means for reversing said rapid traverse mechanism, and means actuated by said reversal for breaking the operative connection of said slow power feed mechanism with said head.

6. In a machine of the classdescribed, a movable head, slow power feed mechanism for moving said head, rapid traverse mechanism for moving said head, a motorifor driving said rapid traverse mechanism, and means actuated by the initial operation of said motor for controlling the operation of said slow power feed mechanism and said rapid traverse mechanism."

7. In a machine of theclass described, a movable head. slow power feed mechanism f()l lllO\ll-lg said head. rapid traverse mecha nism for moving said head. a motor, a worm driven by said motor, said worm having a limited longitudinal movement in response to the actuation of said motor, and means actuated by the longitudinal movement of said norm for controlling the operation of said rapid traverse mechanism by said worm and the operation of said slow power feed mechanism.

8. In a machine of the class described, a

- movable head. slow power feed mechanism for moving said head. rapid traverse mecha- IlSlYl for moving said head, a motor, a worm driven by said motor and adapted to actuate said rapid traverse mechanism, said worm having a limited longitudinal movement inresponse to the initial actuation of said motor, means actuated by the movement of said head for starting and stopping said motor, and means actuated by thelongitu: dinal movement of said worm for controlling the operation of said slow power feed mechanism in the intervals between the operations of said rapid traverse mechanism.

. 9. In a machine of the class described, a movable head, a shaft having a driving connection with said head, slow power feed mechanism, rapid traverse mechanism for raising and lowering said head, and means actuated by the starting of said rapid traverse mechanism for lowering the head to establish a driving connection between said slow feed mechanism and said shaft.

10. In a machine of the class described, a movable head, an operating shaft having a driving connection with said head, slow power feed mechanism for driving said operating shaft, rapid traverse mechanism, means for forming a driving connection between said rapid traverse mechanism and said operating shaft, and means actuated by lit) said slow powerfeed mechanism for breaking said operative connection of said rapid traverse mechanism with said shaft.

11. In a machine of the class described, a movable head, an operating shaft having a driving connection with said head, sloW power feed mechanism, means for connecting said slow power feed mechanism with said operating shaft. rapid traverse mechanism, means actuated by said rapid traverse mechanism for operating said connecting means. and means for arresting-the operation of said rapid traverse mechanism, said connecting {means being adapted to maintain the connection of said slow feed mechanism with said operating shaft after the operation of said rapid traverse mechanism has been arrested.

12. In a machine of the class described, a

movable head, anoperating shaft having a driving connection with said head, rapid traverse mechanism, means for driving said rapid traverse mechanism. and means actuated by the initial operation of said driving means for establishing a driving connection between. said rapid traverse mechanism and said operating shaft.

13..In a machine of the class described, a movable head, an operating shaft having a driving connection with said head. rapid. traverse mechanism, a motor for driving said rapid traverse mechanism, means for actuating said motor in either direction, and means actuated by the initial operation of said motor ineither direction for establishing a driving connection between said rapid traverse mechanism and said operating shaft.

a driving 'connection traverse mechanism and said operating 14. In a machine of the class described, a movable head, an operating shaft having a driving connection with said head, slowpower feed mechanism, rapid traverse mechanism, means for driving said rapid traverse mechanism, means actuated by the initial operation of said drivingmeans for forming a driving connection between said rapid traverse v mechanism and said operating shaft, and means actuated by the operation of said operating shaft by said rapid trav- "erse mechanism for forming a driving connection between said slow power feed mechaerse mechanism for forming a driving connection between said slow power feed mechanism and said operating shaft, said last named connection being adapted to permit the continued operation of said rapid traverse mechanism in moving said head.

16. In a machine of the class described, a: movable head, an operating shaft having a driving engagement with said head, slow power feed mechanism, rapid traverse mechanism, means for driving said. rapid traverse mechanism, means actuated by the initial operation of said driving means for forming a driving connection between said rapid traverse'mechanism and said operaing shaft, and means actuated by the operation of said operating shaft by said rapid traverse mechanism for forming a drivm connection between said slow power fee I mechanlsm and said operating shaft, said last named connection being adapted to permit thecontinued operation of said rapid traverse mechanism in-moving said head, means for arresting the operation of said driving means, and means actuated thereafter by the operation of said driving means,

and means actuated thereafter by the operation of said operating shaft by said slow powfer feed mechanism with said operating sha t.

17. In a machine of the class described, a movable head, an operating shaft having a driving engagement with said head, slow power feed-mechanism, rapid traverse mechanism, means for driving said rapid traverse mechanism, means actuated by the initial operation of said driving, means for formin etween said rapi shaft, means actuated by the operation 0 said operating shaft by said rapid traverse mechanism for forming a driving connection between said slow power feed mechanism and said 0 crating shaft, said last named connection eing adapted to permit the continned operation of said rapid traverse mechanism in moving-said head, means for arresting the operation of said driving means, means actuated thereafter by the operation of said operating shaft by said slow power feed mechanism for breaking the connection of said rapid traverse mechanism with said operating shaft, means for operating said driving mean in the reverse direction, means actuated by the initial reverse operation of said driving, and means for reestablishing the dri'v' connection of said rapid traverse meohanism'with said operating shaft and for breaking the driving connection of said feed mechanism with said operating shaft. 1

18. In a machine of the class described, a movable head, an operating shaft having a driving engagement with said head, slow power feed mechanism, rapid traverse mechanism, means for driving said rapid traverse mechanism, means actuated by the initial operation of said driving means for forming a driving connection between said rapid traverse mechanism and said operating shaft, means act-ua-tedby the operation of said operating shaft by said rapid traverse mechanism for forming a driving connection; between said slow power feed mechanism and said operating shaft, said last named connection being ada ted to permit the continued operation 0 said rapid traverse mechanism in moving said drill -head, means for arresting the operation of said driving means, means actuated thereafter by the operation of said operating shaft by said power feed mechanism for breaking the connection of said rapid traverse mechanism with said operating shaft, means for operating said driving means in the reverse direction, means actuated by the initial reverse operation of said driving means for re-establishing the driving connection of said rapid traverse mechanism with said operating shaft and for breaking the driving connection of said slow feed mechanism with said operation shaft, and independent meansfor making and breaking the connection between said driving means and said rapid traverse mechanism.

19. In a machine of the class described, a. movable head, slow ower feed mechanism for moving said he rapid traverse mechanism for moving said head, a motor carried by the head for driving said rapid traverse mechanism, cam operative means actuated by the movement of said head for controlling the operation of saidmotor, and means actuated in response to the actuation of said motor for controlling the succession of oper- 1. Mai 10 ations of said slow power feed mechanism and said rapid traverse mechanism in'moving said head.

20. In a machine of the class described a movable head, 510 power feed mechanism for moving said head, rapid traverse mechanism for moving said head, a rotating reversible motor for driving said rapid traverse mechanism, manually controlled means for starting said motor, means actuated by the initial movement of said motor for establishing a. driving connection between said slow power feed mechanism and said head, and means actuated by the movement of said head for arresting the operation of said motor after a predeterminedmovement of said head.

21. In a machine of the class deseribedga movable head, slow power feed mechanism for moving said head, rapid traverse mechanism for moving said head, a reversible electric motor for driving said rapid traverse mechanism, manually controlled means for starting said motor, means actuated by the initial movement of said motor for establishing a driving connection between said slow power feed mechanism and said head, means actuated by the movement of said head for arresting the operation of said motor after a predetermined movement of said head, and means actuated thereafter by the operation of said slow power feed mechanism for disconnecting said rapid traverse mechanism.

22. In a machine of the class described, a movable head, slow ower feed mechanism for 'moving said head: rapid traverse mechanism for moving said head, a motor for driving said rapid traverse mechanism, manually controlled means for starting said motor, means actuated by the initial movement of said motor for establishing a driving connection between said slow power feed mechanism and said head, means actuated by the movement of said head for arresting theoperation of said motor after a predetermined movement of said head, means actuated thereafter by the operation of said slow power feed mechanism for disconnecting said rapid traverse. mechanism means actuated by the movement of said head for reversing the operation of said mo; tor, and means actuated by the reverse operation of said motor for breaking the driving connection of said slow power feed mechanism with said head and re-establishing the driving connection of said rapid traverse mechanism with said head.

23. In a machine of the class described, a movable head, an operating shaft having a driving connection with said head, a worm wheel rotatively mounted on said operating shaft, a slow power feed shaft, a worm fixed on said feed shaft and meshing with said worm wheel, a clutch member rotatively mounted adjacent said worm wheel, said clutch member having ratchet teeth, clutch pins resiliently mounted in said worm wheel to engage said ratchet teeth, a second clutch member having a driving engagement with said operating shaft, and means for moving said second clutch member into engagement with said first named clutch member for cfi'ecting slow feeding movement of the head.

24. In a machine of the class described, a movable head, an operatin shaft having a driving connection with said head, a worm wheel rotatively mounted on said operating shaft, :1- slow power feed shaft, a Worm fixed on said feed shaft and meshing with said worm wheel, a clutch member rotatively mounted adjacent said worm wheel, said clutch member having ratchet teeth clutch pins resiliently mounted in said worm wheel to engage said ratchet teeth, a second clutch member having a driving engagement with said operating shaft and adapted .to be moved in engagement with said first named clutch member rapid traverse mechanism for driving sai operatin shaft, and means controlled by said ra i traverse mecha- Iroiism for actuating sai second clutch mem- 25. In a machine of the class described, a movable head, an operating shaft having a driving connection with sa1d head, a. worm wheel rotatively mounted on said operating shaft, a slow power feed shaft, a Worm fixed on said feed shaft and meshing with said worm wheel, a clutch member rotatively mounted adjacent said worm wheel, said clutch member having ratchet teeth clutch pins resiliently mounted in said worm wheel to engage said ratchet teeth, a second clutch member having a driving engagement with said operating shaft and adapted to be moved in engagement with said first named clutch member, a clutch spool slidably mounted on said operating shaft, and cams adapted to be actuated by said spool for mov ng said second clutch member, and means for moving said spool to control the slow feeding movement of the head.

26. In a machine of the class described, a movable head, an operatin shaft having a driving connection with said head, a worm wheel rotatively mounted on said operating shaft, a slow power feed shaft, a worm fixed on said feed shaft and meshing with said worm wheel, a clutch member rotatively mounted adjacent said worm wheel, said clutch member having ratchet teeth clutch pins resilientl mounted in said worm wheel to engage sai ratchet teeth, a second clutch member having a driving engagement with said operating shaft and adapted to I be moved in en 'agement with said first named clutch mem er, a clutch spool slidably mounted on said operating shaft, cams adapted to be actuated by said spool for moving said second clutch member, rapid traverse mechanism for actuating said operating shaft, and means controlled by said rapid traverse mechanism for moving said spool.

27. In a machine of the class described, a

movable head, an operating shaft havin a operatin shaft, a motor, means including a pair of c utch members for forming a drivmg connection between said motor and said operating shaft, a traveling member adapted to be moved by the actuation of said motor, and means actuated by said traveling member for controlling the operation of each pair of said clutch members.

28; In a machine of the class described, a movable head, an operating shaft having a driving connection with said head, slow power'feed mechanism for moving said motor, a pair of clutch members for forming a driving connection between said power mechanism and said operating shaft, 9. pilot shaft, a gear fixed on said pilot shaft, a mo tor, a worm driven by said motor, a worm wheel meshing with said worm, means includin a pair of clutch members for forming a riving connection between said worm wheel andsaid pilot shaft, a gear meshing with said first named gear and rotatively mounted on said operating shaft, a third pair of clutch members for formin a drivmg connection between s-aid operating shaft and said second named gear, and a traveling member actuated by said warm for controlling the operation of said first and third named pairs of'elujtch members.

29. In a machine of the class described, a movable head, an operating shaft having a driving connection with said head, slow power feed mechanism for moving said motor, a pair of clutch members for forming a driving connection between said power mechanism and said operating shaft, a pilot shaft, a gear fixed on said pilot shaft, a motor, a worm governed by said motor, a worm wheel meshin with said worm, means including a pair of e utch members for forming a driving connection between said worm wheel and said pilot shaft, a gear meshing with said first named gear and rotatively mounted on said operating shaft, a third pair of clutch members for forming a drivmg connection between said operating shaft and said second named gear, a traveling member actuated by said worm, and a connection from said traveling member for operating said first and third named pairs of clutch members.

30, In a machine of the class described, a movable head, an operating shaft having erse mechanism; an

a driving connection with said head, slow ptilot shaft, a. gear fixed on said pilot .sha a motor, a worm governed by said motor, a worm wheel meshin with said worm, means including a pair of c utch members for forming a driving connection between said worm wheel and said pilot shaft, a gear meshing with said first named gear and rotatively mounted on said operatingshaft, a third pair. ofclutch members for forming a driving connection between said operating shaft and said second named gear, aftraveling member actuated by said worm, and a connection from said traveling member for operating said first and third named pairs of clutch members, said connections being adapted to permit the disconnection of said third named pair of clutch members before the disconnection of said second named pair tion comprising a movable head; a slow power feed mechanism for moving the head; a rstpid traverse mechanism for moving said hea a motor for operating the rapid travmeans operated by the motor rotating in one direction for operatively connecting the slow feed mechanism to move the head and operated by the motor rotating in. a reverse direction to disconnect the slow feed mechanism.

33. In a drilling machine, the combination comprisin a movable head; a slow power feed mec anism for moving the head; a re id traverse mechanism for moving the hea a motor rotatable in a forward and in a reverse direction for operating the rapid traverse mechanism, a clutch for connecting the slow feed mechanism to move the head; and means for operating said clutch in accordance with the direction of rotationgof the motor. 5

34. In" a drilling machine, the combina tion comprising a. movable head; a slow power feed mechanism for moving the head; a'rapid traverse mechanism for moving the head, said traverse mechanism being carried by the head; a motor carried by the head and rotatable in a forward and in a reverse direction for operating the ra id traverse mechanism; a clutch for control ing the slow feed mechanism; and means for controlling said clutch in accordance with the direction of rotation of the motor.

35. In a drilling machine, the combination comprising a movable head; slow power feed mec anism for moving said head; rapid traverse mechanism for moving said head; a motor rotatable in a "forward and in a' reverse direction for operating the rapid traverse mechanism; means for operating the motor in accordance with the movement of the head; and means for operating the'slow feed mechanism in accordance with the direction of rotation of the motor.

36. In a drilling machine, the combina- 'tion comprising a movable head; slow power feed mechanism for moving said head; rapid traverse mechanism for raising and lowering said head; means for controlling the rapid traverse mechanism according to the movement of the head; and means operated upon starting the traverse mechanism in one direction 'for connecting the slov; power feed 2 mechanism to the bee ROBERT M. GALLOWVAY. PAUL C. BURTON. i 

